program/scrpt wanted (in python, of course)

[Skaperen]

i am looking for a command that can sort a file (or stream from stdin to stdout) much like the posix/unix/linux sort command, but based on the key being an IP address.  bonuses: can you do it with just modules that come with Python?  can you include support for IPv6?

[Windspar]

A list to test would make it easier.
Here something I threw together. Might get you started.

ip_address = [
    '192.168.0.1',
    '192.168.0.5',
    '20.101.24.5',
    '101.17.31.8',
    '41.37.101.40',
    '41.37.101.4'
    ]
    
def sort_ip(key):
    if key.count('.') == 3:
        return 4, [k.rjust(3) for k in key.split('.')]
    else:
        # need more data for dealing with ipv6 address
        return 6, [k.rjust(4) for k in key.split(':')]
    
def main():    
    ip_address.sort(key=sort_ip)
    for ip in ip_address:
        print(ip)
    
main()

[Skaperen]

needs to be able to sort a file.  what if the file is massively huge (larger than available virtual memory)?

how does your code compare fc00::1 with fc00:0:2::1 ?

how does your code deal with addresses like: fc00::1.2.3.4 ?

[snippsat]

Use ipaddress module,handles IPv4 and IPv6 addresses.

>>> import ipaddress

>>> ip_1 = ipaddress.ip_address('fc00::1')
>>> ip_2 = ipaddress.ip_address('fc00:0:2::1')
>>> ip_1 < ip_2
True

Address and Network objects are not sortable by default.
If still need to do it there is ipaddress.get_mixed_type_key that be used  as a key in sorted().

import ipaddress

>>> ip_1 = ipaddress.ip_address('fc00::9')
>>> ip_2 = ipaddress.ip_address('fc00::5')
>>> ip_3 = ipaddress.ip_address('fc00::3')
>>> ip_4 = ipaddress.ip_address('fc00::100')
>>> sorted([ip_1, ip_2, ip_3, ip_4], key=ipaddress.get_mixed_type_key)
[IPv6Address('fc00::3'), IPv6Address('fc00::5'), IPv6Address('fc00::9'), IPv6Address('fc00::100')]

[Skaperen]

what about all the ips in fc00:/7 (fc00:: to fdff:ffff:ffff:ffff:ffff:ffff:ffff:ffff)?

what about any ipv6 (in ::/0)

is module ipaddress in Python2.6?  3.4?  3.3?

[snippsat]

what about all the ips in fc00:/7 (fc00:: to fdff:ffff:ffff:ffff:ffff:ffff:ffff:ffff)?
what about any ipv6 (in ::/0)

The module follow the standard in RFC 4291.

is module ipaddress in Python2.6?  3.4?  3.3?

It's backport to 2.6.